/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.spark.api.java

import com.google.common.base.Optional

import scala.collection.convert.Wrappers.MapWrapper

private[spark] object JavaUtils {
  def optionToOptional[T](option: Option[T]): Optional[T] =
    option match {
      case Some(value) => Optional.of(value)
      case None => Optional.absent()
    }

  // Workaround for SPARK-3926 / SI-8911
  def mapAsSerializableJavaMap[A, B](underlying: collection.Map[A, B]) =
    new SerializableMapWrapper(underlying)

  class SerializableMapWrapper[A, B](underlying: collection.Map[A, B])
    extends MapWrapper(underlying) with java.io.Serializable

}
